In some cases, additional information is provided for the BusinessInteraction in the form of external document. Such a document can be provided by the CSP (such as a brochure or a manual) or by the Customer (such as a picture, screenshot or a report of a diagnostic software). These supporting documents are normally stored in a central document management system, and the BusinessInteraction can link to such document(s) via the Attachment entity.<br/>In summary, a business interaction involves a number of other business entities, including product offerings, products, Locations, and business participants.<br/>By using the concept of a business interaction, each of its various types, such as agreement and notification, can inherit the business interaction’s relationships, attributes and behaviors without having to explicitly show these for each type.  For example, it would be quite redundant and unstable to show an agreement and a notification, and a request, and a response, and a command each participating in relationships to business participants, locations, products, services, and resources.  What would happen if this was done and another type of business interaction was discovered?<br/>